Lochnair my apologies, the repository was not updated. try again now.
Thank you
Thanks!
Some fiddling later and I've got the builds going. I think the only problem was that the RTL8189ES package wasn't actually added to the ADDITIONAL_PACKAGES for the device, so the modules didn't get included in the build.
After adding that it seems to work well, connected to the wifi without any difficulty The only thing I'm not sure about if it's using the correct MAC addresses or not, the label on the box doesn't say, so I'm not sure what they're supposed to be.